Bright, Multicoated Lenses and BaK4 High Index PrismsDeliver bright, high-resolution images.Long Eye ReliefFor a clear and comfortable view, especially for people who wear eyeglasses.Smooth Central Focus KnobFast range of focus for quick viewing. No bird goes unseen.Unique Click-Stop, Twist-Out Eyecup DesignDelivers both long eye relief and variable eye relief to customize these binoculars to your eyes and accommodate glasses.Ergonomic Body DesignComfortable for extended viewing.Durable and Protective, Rubber-Armored CoatingProvides a sure, non-slip grip, wet or dry.Waterproof/FogproofNitrogen filled and O-ring sealed.